Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher.
Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?
Some links on this page may take you to non-federal websites. Their policies may differ from this site.
-
This study investigates the use of hydride-dehydride non-spherical Ti-6Al-4V powders in laser powder bed fusion process and the effects of post-heat-treatments on additively manufactured parts. As-built parts show anisotropic microstructure with α′ martensite and some β phases. Post heat-treated parts exhibit α + β phases, with characteristics dependent on the heat treatment. Heat treatment below β-transus leads to homogenized grain structures with improved corrosion resistance. Electrochemical analysis reveals a very stable corrosion rate due to faster formation of a protective passive layer aided by the fine-structured β phase. X-ray photoelectron spectroscopy examines corrosion behavior and film growth mechanism in saline water.more » « lessFree, publicly-accessible full text available November 1, 2024
-
Free, publicly-accessible full text available July 1, 2024
-
Free, publicly-accessible full text available June 1, 2024
-
Free, publicly-accessible full text available May 1, 2024
-
Evans, Conor L. ; Chan, Kin Foong (Ed.)Pancreatic ductal adenocarcinomas (PDACs) are often treatment resistant, and as such widefield imaging methods for the evaluation of ECM composition are needed. Here we present a method to measure the relative abundance of ECM diffracting components in PDAC samples alongside drug penetration in widefield images. Orthotopic mouse PDAC xenografts are grown and assessment of drug penetration as well as ECM composition is done using co-registration of scanning x-ray diffraction (XRD) and EGFR-specific drug penetration fluorescent widefield images. Preliminary data suggests a strongly negative correlation between abundance of diffracting ECM components and penetration of large drugs in solid tumors. This methodology may be used to provide crucial insights into both drug-development approaches and multi-therapeutic treatment strategies in late stage PDAC patients presenting with ECM desmoplasia.more » « less
-
The diffusion phenomenon in the Ti–Ni binary system was investigated at a temperature of 1173 K. Microstructure and texture analysis revealed the formation of three stable intermetallic compounds, namely Ti2Ni, TiNi, and TiNi3, as well as two metastable intermetallic compounds, including Ti3Ni4 and Ti2Ni3, at the interfacial diffusion zone. The nucleation surface energy increase was analytically estimated, and marker experiments were conducted using thoria particles, both of which showed that Ti2Ni was the first compound to form at the Ti–Ni diffusion interface. At a temperature of 1173 K, using the Wagner method, the integrated diffusion coefficients for the Ti2Ni, TiNi, and TiNi3 phases were calculated to be 3.53 × 10−12, 18.1 × 10−15, and 6.2 × 10−15 m2/s, for, respectively.more » « less
